We stayed at Sara's apartment for 1,5 month and it was great!
First I want to point out that view from the windows was amazing! Very green with birds singing. Second that sun doesnt shine into apartment during day and it gives opportunity to enjoy sounds from outside and actually not use aircon in some days. Location is perfect: Benchakitti park, Sukhumvit road, shops, restaurants minutes away by foot. Gym, pool was great for us too. Apartment has everything you need either for short stay or long one.
We couldn't find minuses for us except not very comfortable sofa :)